Clinical Chem Practice Questions COMPLETE SOLUTIONS

Clinical Chem Practice Questions COMPLETE SOLUTIONS

in what form is glucose stored in the liver? - ✔✔glycogen

which of the following hormones has the ability to decrease glucose concentration?

-glucagon -epinephrine -insulin -thyroxine - ✔✔insulin

which form of diabetes manifest itself later in life and is associated with obesity, physical inactivity, and glycosuria? - ✔✔type 2 diabetes

which of the following is a characteristic of type 1 diabetes mellitus?

-low insulin levels -ketosis often accompanied by hyperglycemia -high frequency of autoab to islet calles -all of the above - ✔✔all of the above

which statement regarding glycosylated hgb (A1c) is true?

-it has a sugar attached to the hgb-beta-chain -it is dependent on the time avg blood glucose over the rbc life -levels below 7% indicate adequate regulation for 8-12 weeks prior to sampling -all of the above - ✔✔all of the above

what hormone plays a primary role in controlling the reabsorption of Na in the tubules?

-cortisol -cortisone -estriol -aldosterone - ✔✔aldosterone

list 3 post-analytical errors associated with chemistry specimens - ✔✔the accuracy of the results, reported results not delivered to the physician on time or having instrument malfunctions

which of the following blood additives is most useful for serum collection?

-polymer barrier -oxalate -EDTA -citrate - ✔✔polymer barrier (SST)

which one of the following electrolytes is the major intracellular cation?

-Na -K -Cl -Ca - ✔✔potassium (K)

which of the following is not included in the electrolyte panel?

-Na -Ca

-K -Cl - ✔✔Ca

electrolyte panel: Na, K, Cl, CO2 (HCO3)

which of these electrolytes would be affected the most by hemolysis?

-Cl -Na -K -Ca - ✔✔potassium (K)

CO2 is predominately found in blood in the form of

-bound CO2 -bicarbonate ions -sodium carbonate -pCO2 - ✔✔bicarbonate ions (HCO3)

sodium fluoride is an excellent preservative for collecting glucose specimens because:

-prevents interference with other substances -inhibits glycolysis -enhances chemical rxn -inhibits certain clotting factors - ✔✔inhibits glycolysis

fluoride inhibits enolase in the glycolytic pathway

which of the following is not a characteristic of severe hyperglycemia?

-polyuria -ketonuria -glycosuria -hypoglucogonemia - ✔✔hypoglucogonemia???

which test maybe performed to assess the avg plasma glucose level that an individual maintained during a previous 2-3 month period?

-plasma glucose -2-hr postprandial glucose -oral glucose tolerance -glyocated hgb - ✔✔glyocated hgb (A1c)

lab tests are performed for a postmenopausal 57 yr old woman as part of an annual physical examination. the pt's random serum glucose is 220 mg/dL, and the A1C is 11%. Based on this information, this pt would most likely be classified as

-normal -impaired -having type 1 diabetes -having type 2 diabetes - ✔✔having type 2 diabetes

an increased osmolal gap is most common seen in which of the following?

-type 2 diabetes -pancreatitis -presence of toxins such as ethanol and ethylene glycol -liver failure - ✔✔presence of toxins such as ethanol and ethylene glycol